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1Published 1937Subjects: “...United States. National Bituminous Coal Commission....”
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3by McCulloch, C. M. (Charles M.)Subjects: “...Bituminous coal....”
Published 1974
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Government Document Book -
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5Published 1886Subjects: “...Bituminous coal....”
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6Published 1943Subjects: “...Bituminous coal....”
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7Published 1932Subjects: “...Bituminous coal Congresses....”
Conference Proceeding Book -
8Published 1929Subjects: “...Bituminous coal Congresses....”
Conference Proceeding Book -
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10Published 1975Subjects: “...Bituminous coal Pennsylvania....”
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11Published 1975Subjects: “...Bituminous coal Australia Congresses....”
Conference Proceeding Book -
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15Published 1973Subjects: “...Bituminous coal Pennsylvania Tables....”
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